Reedsburg, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.4 °F (low) to 56 °F (high). Annual precipitation averages 38.5 Inches. Reedsburg is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.6 °F | 26.2 °F | 1.5 in. |
| February | 11.2 °F | 30.5 °F | 1.43 in. |
| March | 22.3 °F | 42.7 °F | 2.15 in. |
| April | 34.0 °F | 56.3 °F | 4.04 in. |
| May | 45.9 °F | 68.4 °F | 4.54 in. |
| June | 56.2 °F | 77.9 °F | 5.47 in. |
| July | 60.0 °F | 81.8 °F | 4.48 in. |
| August | 57.7 °F | 79.8 °F | 4.54 in. |
| September | 49.4 °F | 72.5 °F | 3.5 in. |
| October | 37.4 °F | 59.4 °F | 2.93 in. |
| November | 26.3 °F | 44.3 °F | 2.09 in. |
| December | 15.6 °F | 31.7 °F | 1.81 in. |
| Annual | 35.4 °F | 56 °F | 38.48 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |